One thing I learned the hard way, and I'm sure I am not alone, is to not go crazy with the first several builds. Just get a kit and put it together right out of the box. Don't do any fancy aftermarket or try to do any kit corrections. Just build the kit, get a feel for what you're doing and enjoy the process. Don't get hung up on accuracy or color choices. Who makes the correct color, best brand and all that. Just build it and make it look OKay. Next one you will see your weaknesses and work on that. After awhile you can begin to do corrections or aftermarket, pick the "exact" correct colors with your choice of paint supplier etc etc.
Watch TONS of videos from other builders, those who have kits to show that actually look good and learn from them new ways to improve your builds. You won't keep all of it, but it will help you get better. There is only so far one can go on any forum. You're gonna have to watch good builders and learn from them.
Some suggestions regardless of kit types might be:
Barbatos Rex -- product reviews and tips, great channel for supplies and ideas
Flying S Models -- doesn't look like he's active anymore, but great builder
Laser Creaston-World -- this guy is really a good builder all around, cool ideas
Boylei Hoby Time -- Incredible scratch builder, lots of ideas and LED use
Model Car Muse -- Kinda laid back but very good builder with excellent advise
Night Shift -- one of my all time favorite builders, incredible skills and funny
Panzermeister36 -- younger builder with HUGE skills and tons of helpful tips
SpruesNBrews Scale Modeling -- great builder with lots of useful tips
This is just few. Some are cars, some armor, and some anything. The point is you can learn something about our craft from everyone. Learn from your mistakes and try new things that are out of your comfort zone, it will improve your work.
BK